Exhaust device for compression-engines.



v E. F. HAFELFINGER. EXHAUST DEVICE FOR GQMPRESSION ENGINES Patented Dec. 8

fin 'V 5, 0 M W I n A s W/ TA E SSE S EMIL F. HAFELFINGER, OF WEEHAWKEN, NEW JERSEY.

EXHAUST DEVICE FOR COMPRESSION-ENGINES Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed August 29, 1906. Serial No. 332,434.

To all whom it may concern:

a citizen of the United States of America,

residing at \Veehawken, in the county of Hudson and State of New Jersey, have invented a new and useful Exhaust Device for Compression-Engines; and I do hereby declare the following to be a-full, clear,-and exact description of the same.

My present invention relates especially to novel means whereby an exhaust valve of a gas or gasolene engine is opened, to the extent desired, during the starting of the motor. At such time, especially when the m0- tor is used to drive a motor-bicycle or'an automobile, it is especiallydesirable to lift the exhaustvalve stem, in order thatithe normal compression be relieved as the engine is started. i I In the accompanying drawing, I have shown a form of arrangement which is es pecially useful in connection with a motorbicycle (one driven by a hydrocarbon 1nolor, preferably), and, for convenience and economy in construction, have also shown the litter controlling device combined with a rod or the like which controls the sparking means.

Referring to the drawings, Figure 1 shows, somewhat diagrammatically,myimprovements as applied to a motor-bicycle, part of the frame being shown; Fig.2 shows (enlarged) the relations of the parts during starting of the engine; and Fig. 3 is an end view of the assembled valve litter, lever therefor, cam and lever-controller, all re moved from the casing.

1 indicates the bottom front-brace of a bicycleframe, and 2 indicates chain for driving the rear-sprocket.

3 indicates the fly-wheel case, and 4 indicates the engine cylinder, wherein a mixture of vaporized gasolene with compressed air is ignited.

5 indicates a casing for containing an exhaust valve, and 6 indicates the stem of such a valve. A spring, 7, surrounding said valve, yieldingly holds it to place.

8 indicates a pipe through which is fed gasolene from a carburetor.

The device is proi ided with a valve lifter, l0, and I have shown a vertical rod for said purpose, said rod slidably fitting within a bore formed through an extension 95 of the cam-casing 11. Said casing 11 is in the form of a shell or cap, secured by screws 7-5 to the fly-wheel case, 3, and is provided'with a bottom ring, which fits the fly-wheel axle 40. Near its bottom end, said. cam-casing is bored diagonally through its opposite side walls, and a bolt 12 is slidably fitted within the bores thus formed, and normally the lower end of said bolt yicldingrly projects, as shown in Fig. 1, a slight distance from the casing. For this purpose, the opposite ends of a spring 27 fit in a recess in the upper end of bolt 12 and in a recess 25 in a screw cap 26, the threads of which engage with threads of the bore 14- of the casing, and which is used to adjust the tension of spring; 2? or to remove same.

.15 indicates a cam or projection carried by a spark controller or sparker (shown dotted at 16), and such cam or projection may, as shown in the drawings, be carried by a plate 1.7, (oscillating upon the outside of the cam-casing) movable to valve-lifting position (as shown in Fig. 2) or to a position ineffective upon the valve (as shown in Fig. 1), by means of a rod'lS, one end of which is connected with the plate 17 and the other end of. which is connected with any desired point upon the motoubicyclc, such as a small lever pivotally carried by the topbar of the bicycle-frame.

In the position shown in Fig. 1, the cam 15 is drawn away from the end of the bolt 12, and such bolt projects from the casing 11.

This downward projection of the bolt draws the valve lifter down to a. position where it will be operated, at the desired regular intervals, by an exhaust valve cam. in such position, as shown in Fig. 1, the upper end of the valve lifter 10 is slightly separated from the lower end of the exhaust valve stem 6, so as to permit independent adjust ment of the latter.

The bolt 12 is employed to positively raise and lower the valve-lifter 10, so as to be maintained open or partly open, or be regularly acted upon by the exhaust valve cam. F or this purpose (see Figs. 2 and 3), the bolt 12 is provided with an inwardlyprojecting pin 28, and such pin projects through the slot 29 in the lower arm of a lever 30 within the-cam-casing 11 and pivoted at 31. The upper arm 32 of such lever slidablyengages with the lower end 34 0f the valve-lifter 10, and underneath a shoulder as provided by cutting away a portion of such valve-lifter.

Tn the normal position of the parts (the mits projection of thelatter, and causes'the upper arm 32 of the lever to be drawn downwardly, and the valve-lifter 10 to bemoved downwardly in its casing by the spring 7, acting uponthe stem 6. In such position, the lower end 34- of the lifter will be in the path of the exhaust-valve cam 51, driven by shaft 50, and the lifter Will be regularly raised and lowered once for eachlrotation of the shaft 50, and Will effect the exhaust as desired. When, however, the bicycle has been stopped, and it is desired to again start'the motor, it is usual for the rider to do so by pedaling a few strokes until. the motor begins to regularly operate, and it is advisable to have the normal compression of the engine relieved until such regular operation of the motor is assured. For this purpose, the sparker or plate 17 is drawn forward (as shown in Fig. 2) by means of the rod 18 and the engagement of the came 1579f such plate With the bolt causes the retreat of the latter and the movement of the lever 30 to the position shown in Fig. 2, whereupon the upper arm 32 of such lever pushes the valve lifter l0 and the latter holds .the exhaust valve from its seat, and permits the compression to be relieved until the/rod 18 and plate 17 are operated as desired. It Will be readily understood, of course, that the degree of projection and (by means of the le-' ver 30) the extent of opening of the exhaust valve may begvaried as desired, and may also be changed during the running of the motor-bicycle or other vehicle, by causing the cam 15 to engage with the bolt l2to any extent desired. f

The form of my invention'illustrated in the drawings, is one which permits a ready and easy. control of the exhaust of the motor especiallyduring the starting, and is simple, durable and economical. In addition, the employment of my invention, especially when using a cam eontrolled by a sparkcontrollei; oreparker, results in a reduction mechanism, adapted to engage sai means for holding said bolt in contact with of'the numberjof operating parts and a lessenin oflcare necessary to be given to the mac ine.

What I claim is: g 1. In an exhaust device for explosion engines, 3n exhaust-valve lifter, an exhausta cam for moving said bolt as desired, for

valvecam, and means comprising a bolt and moving the exhaust-valve lifter into and out of the path of the exhaust-valve cam.

' 2. In an exhaust device for explosionengines, an exhaust-valve cam casing, an exhaustw'alve lifter mounted for reciprocation in said casing, a lever pivoted Within the casing and having an arm in enga ement with the exhaust-valve lifter, a bolt s idably mounted, in the casing and engaging the lever, and .means for moving the bolt as desired.-

= 3.- In 'anexha ust device for explosion engines, an 'exhaust'valve lifter, an exhaust valve cam, anda bolt-land connections therefrom for moving said exhaust-valve lifter intoand out/of the path of said cam, in combination with a pivoted plate provided with a cam and arranged to operate the bolt aforesaid.

4. In an explosion engine, the combination of an exhaust valve stem, a lifter there for, a pivoted lever .which engages saidlifter, ongitudinally movable bolt adapted to move said-lever, an adjustable ignition mechanism, means attached to said i nition said last mentioned means, an adjusting means'attached to said ignition mechanism, said parts being arranged for a simultaneous adjustment of the ignition mechanism and valvestem.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnescs.

' EMIL F. HAFELFINGER. Witnesses:

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